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RefreshListView.js
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RefreshListView.js
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//
// Created by Liu Jinyong on 17/4/5.
// Copyright © 2016年 Liu Jinyong. All rights reserved.
//
// @flow
// Github:
// https://github.com/huanxsd/react-native-refresh-list-view
import React, {PureComponent} from 'react'
import {View, Text, StyleSheet, FlatList, ActivityIndicator, TouchableOpacity, Dimensions} from 'react-native'
export const RefreshState = {
Idle: 0,
HeaderRefreshing: 1,
FooterRefreshing: 2,
NoMoreData: 3,
Failure: 4,
}
const DEBUG = false
const log = (text: string) => {DEBUG && console.log(text)}
const footerRefreshingText = '数据加载中…'
const footerFailureText = '点击重新加载'
const footerNoMoreDataText = '已加载全部数据'
type Props = {
refreshState: number,
onHeaderRefresh: (refreshState: number) => void,
onFooterRefresh?: (refreshState: number) => void,
data: Array<any>,
footerContainerStyle?: any,
footerTextStyle?: any,
}
type State = {}
class RefreshListView extends PureComponent {
props: Props
state: State
componentWillReceiveProps(nextProps: Props) {
log('[RefreshListView] RefreshListView componentWillReceiveProps ' + nextProps.refreshState)
}
componentDidUpdate(prevProps: Props, prevState: State) {
log('[RefreshListView] RefreshListView componentDidUpdate ' + prevProps.refreshState)
}
onHeaderRefresh = () => {
log('[RefreshListView] onHeaderRefresh')
if (this.shouldStartHeaderRefreshing()) {
log('[RefreshListView] onHeaderRefresh')
this.props.onHeaderRefresh(RefreshState.HeaderRefreshing)
}
}
onEndReached = (info: any) => {
log('[RefreshListView] onEndReached ' + info.distanceFromEnd)
if (this.shouldStartFooterRefreshing()) {
log('[RefreshListView] onFooterRefresh')
this.props.onFooterRefresh && this.props.onFooterRefresh(RefreshState.FooterRefreshing)
}
}
shouldStartHeaderRefreshing = () => {
log('[RefreshListView] shouldStartHeaderRefreshing')
if (this.props.refreshState == RefreshState.HeaderRefreshing ||
this.props.refreshState == RefreshState.FooterRefreshing) {
return false
}
return true
}
shouldStartFooterRefreshing = () => {
log('[RefreshListView] shouldStartFooterRefreshing')
let {refreshState, data} = this.props
if (data.length == 0) {
return false
}
return (refreshState == RefreshState.Idle)
}
render() {
log('[RefreshListView] render')
return (
<FlatList
onEndReached={this.onEndReached}
onRefresh={this.onHeaderRefresh}
refreshing={this.props.refreshState == RefreshState.HeaderRefreshing}
ListFooterComponent={this.renderFooter}
{...this.props}
/>
)
}
renderFooter = () => {
let footer = null
let footerContainerStyle = [styles.footerContainer, this.props.footerContainerStyle]
let footerTextStyle = [styles.footerText, this.props.footerTextStyle]
switch (this.props.refreshState) {
case RefreshState.Idle:
footer = (<View style={footerContainerStyle} />)
break
case RefreshState.Failure: {
footer = (
<TouchableOpacity
style={footerContainerStyle}
onPress={() => {
this.props.onFooterRefresh && this.props.onFooterRefresh(RefreshState.FooterRefreshing)
}}
>
<Text style={footerTextStyle}>{footerFailureText}</Text>
</TouchableOpacity>
)
break
}
case RefreshState.FooterRefreshing: {
footer = (
<View style={footerContainerStyle} >
<ActivityIndicator size="small" color="#888888" />
<Text style={[footerTextStyle, {marginLeft: 7}]}>{footerRefreshingText}</Text>
</View>
)
break
}
case RefreshState.NoMoreData: {
footer = (
<View style={footerContainerStyle} >
<Text style={footerTextStyle}>{footerNoMoreDataText}</Text>
</View>
)
break
}
}
return footer
}
}
const styles = StyleSheet.create({
footerContainer: {
flex: 1,
flexDirection: 'row',
justifyContent: 'center',
alignItems: 'center',
padding: 10,
height: 44,
},
footerText: {
fontSize: 14,
color: '#555555'
}
})
export default RefreshListView